clamshell

[klam-shel]

noun

the shell of a clam.

an object that has two hinged parts and that opens and closes like a clamshell, as a laptop computer or a box with a cover joined on one side: This clamshell is lightweight, convenient, and as powerful as my desktop computer.

Machinery.

Also called clamshell bucket.a dredging bucket opening at the bottom, consisting of two similar pieces hinged together at the top.